Scientists can now “see” a single living cell made visible by its own light. A new image intensifier, which amplifies the very faint light of an individual cell in a way somewhat like the television screen makes its bright picture, has been developed. It can be made to amplify light as much as a million and a half times….

George T. Reynolds of Princeton … used the image intensifier with a microscope to take pictures of Noctiluca miliaris, a tiny sea creature that gives the ocean its phosphores...